Sorry to hear that! Double check your character collection, the moment you press the button to purchase any relic or 10+1 relics, the fighters are instantly added to your collection. The fun animation on the relic opening page is an added bonus!
If your in-game handle is also Khelbain, I can see in your account that on January 17th at about 9:30pm Pacific time, you purchased and opened 11 Premiere Relics and received 11 Fighters. I can tell you which Fighters you got if you need to know!